import * as gatsby from "gatsby";
import * as prismicH from "@prismicio/helpers";
import * as prismicT from "@prismicio/types";
import * as RTE from "fp-ts/ReaderTaskEither";
import { pipe, identity } from "fp-ts/function";

import { buildObjectType } from "../lib/buildObjectType";

import { Dependencies } from "../types";

/**
 * Builds a GraphQL Type used by Link fields. The resulting type can be created
 * using Gatsby's `createTypes` action.
 */
// TODO: Move typename to Dependencies (create in `buildDependencies.ts`).
export const buildLinkType: RTE.ReaderTaskEither<
	Dependencies,
	never,
	gatsby.GatsbyGraphQLType
> = pipe(
	RTE.ask<Dependencies>(),
	RTE.chain((deps) =>
		buildObjectType({
			name: deps.nodeHelpers.createTypeName("LinkType"),
			fields: {
				link_type: deps.globalNodeHelpers.createTypeName("LinkTypeEnum"),
				isBroken: "Boolean",
				url: {
					type: "String",
					resolve: (source: prismicT.LinkField): string | null =>
						prismicH.asLink(source, deps.pluginOptions.linkResolver),
				},
				target: "String",
				size: "Int",
				id: "ID",
				type: "String",
				tags: "[String]",
				lang: "String",
				slug: "String",
				uid: "String",
				document: {
					type: deps.nodeHelpers.createTypeName("AllDocumentTypes"),
					resolve: (source: prismicT.LinkField): string | null =>
						source.link_type === prismicT.LinkType.Document &&
						"isBroken" in source &&
						!source.isBroken
							? deps.nodeHelpers.createNodeId(source.id)
							: null,
					extensions: { link: {} },
				},
				localFile: {
					type: "File",
					extensions: {
						link: {},
					},
				},
				raw: { type: "JSON", resolve: identity },
			},
		}),
	),
);